Reverse Keys and Values of Python Dictionaries

reverse.py

cities = {'London': 'UK', 'Tokyo': 'Japan', 'New York': 'US'}
# Method 1
reversed_cities = {v: k for k, v in cities.items()}
print(reversed_cities)
# {'UK': 'London', 'Japan': 'Tokyo', 'US': 'New York'}

# Method 2
reversed_cities = dict(zip(cities.values(), cities.keys()))
print(reversed_cities)

# Method 3
reversed_cities = dict(map(reversed, cities.items()))
print(reversed_cities)